Tympanotonos is a genus of snail living in brackish water, a gastropod mollusk in the family Potamididae. Extant and extinct species Species within this genus include: † Tympanotonus calcaratus (Grateloup, 1840) † Tympanotonus conarius (Bayan, 1873) Tympanotonos fuscatus (Linnaeus, 1758) (the only extant species) † Tympanotonus margaritaceum (Brongniart) † Tympanotonos redoniensis Van Dingenen, Ceulemans & Landau, 2016 † Tympanotonus semperi (Deshaye, 1864) † Tympanotonos stroppus Brongniart 1823 Fossils species within this genus can be found in sediment of Europe, United States, South Africa, Japan, Venezuela and Indonesia from Cretaceous to Quaternary (age range: 84.9 to 0.012 Ma). References Kiel S. (2003) New taxonomic data for the gastropod fauna of the Umzamba Formation (Santonian–Campanian, South Africa); Cretaceous Research 24 (2003) 449–475 External links DANIELA ESU and ODOARDO GIROTTI THE LATE OLIGOCENE MOLLUSCAN FAUNA FROM OTRANTO (APULIA, SOUTHERN ITALY): AN EXAMPLE OF ALTERNATING FRESHWATER, LAGOONAL AND EMERGED ENVIRONMENTS Geocities - Potamidae Potamididae Extant Cretaceous first appearances